<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>4xx-error</title>
<style>
.welcome{
	position:absolute;
	top:40%;
	left:50%;
	-moz-transform:translate(-50%,-50%);
	transform:translate(-50%,-50%);
}
</style>
</head>
<body>
<img class="welcome" src="../images/yc.png"/>

<script type="text/javascript">
	alert("您访问的功能正在开发中...");
	history.back(-1);
</script>
</body>
</html>